13 files changed, 98 insertions, 70 deletions

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 12c97d8aa6bb..abe46a4228ce 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -1671,7 +1671,7 @@ void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr)
 static void addrconf_join_anycast(struct inet6_ifaddr *ifp)
 {
         struct in6_addr addr;
-        if (ifp->prefix_len == 127) /* RFC 6164 */
+        if (ifp->prefix_len >= 127) /* RFC 6164 */
                 return;
         ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
         if (ipv6_addr_any(&addr))
@@ -1682,7 +1682,7 @@ static void addrconf_join_anycast(struct inet6_ifaddr *ifp)
 static void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
 {
         struct in6_addr addr;
-        if (ifp->prefix_len == 127) /* RFC 6164 */
+        if (ifp->prefix_len >= 127) /* RFC 6164 */
                 return;
         ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
         if (ipv6_addr_any(&addr))
@@ -2509,7 +2509,8 @@ static void add_addr(struct inet6_dev *idev, const struct in6_addr *addr,
         struct inet6_ifaddr *ifp;
 
         ifp = ipv6_add_addr(idev, addr, NULL, plen,
-                            scope, IFA_F_PERMANENT, 0, 0);
+                            scope, IFA_F_PERMANENT,
+                            INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
         if (!IS_ERR(ifp)) {
                 spin_lock_bh(&ifp->lock);
                 ifp->flags &= ~IFA_F_TENTATIVE;
@@ -2613,7 +2614,7 @@ static void init_loopback(struct net_device *dev)
                         if (sp_ifa->rt)
                                 continue;
 
-                        sp_rt = addrconf_dst_alloc(idev, &sp_ifa->addr, 0);
+                        sp_rt = addrconf_dst_alloc(idev, &sp_ifa->addr, false);
 
                         /* Failure cases are ignored */
                         if (!IS_ERR(sp_rt)) {
@@ -2637,7 +2638,8 @@ static void addrconf_add_linklocal(struct inet6_dev *idev, const struct in6_addr
 #endif
 
 
-        ifp = ipv6_add_addr(idev, addr, NULL, 64, IFA_LINK, addr_flags, 0, 0);
+        ifp = ipv6_add_addr(idev, addr, NULL, 64, IFA_LINK, addr_flags,
+                            INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
         if (!IS_ERR(ifp)) {
                 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0);
                 addrconf_dad_start(ifp);
@@ -3456,7 +3458,12 @@ restart:
                                          &inet6_addr_lst[i], addr_lst) {
                         unsigned long age;
 
-                        if (ifp->flags & IFA_F_PERMANENT)
+                        /* When setting preferred_lft to a value not zero or
+                         * infinity, while valid_lft is infinity
+                         * IFA_F_PERMANENT has a non-infinity life time.
+                         */
+                        if ((ifp->flags & IFA_F_PERMANENT) &&
+                            (ifp->prefered_lft == INFINITY_LIFE_TIME))
                                 continue;
 
                         spin_lock(&ifp->lock);
@@ -3481,7 +3488,8 @@ restart:
                                         ifp->flags |= IFA_F_DEPRECATED;
                                 }
 
-                                if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))
+                                if ((ifp->valid_lft != INFINITY_LIFE_TIME) &&
+                                    (time_before(ifp->tstamp + ifp->valid_lft * HZ, next)))
                                         next = ifp->tstamp + ifp->valid_lft * HZ;
 
                                 spin_unlock(&ifp->lock);
@@ -3761,7 +3769,8 @@ static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
         put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope),
                       ifa->idev->dev->ifindex);
 
-        if (!(ifa->flags&IFA_F_PERMANENT)) {
+        if (!((ifa->flags&IFA_F_PERMANENT) &&
+              (ifa->prefered_lft == INFINITY_LIFE_TIME))) {
                 preferred = ifa->prefered_lft;
                 valid = ifa->valid_lft;
                 if (preferred != INFINITY_LIFE_TIME) {
diff --git a/net/ipv6/datagram.c b/net/ipv6/datagram.c
index 8dfe1f4d3c1a..93b1aa34c432 100644
--- a/net/ipv6/datagram.c
+++ b/net/ipv6/datagram.c
@@ -73,7 +73,6 @@ int ip6_datagram_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
                         flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
                         if (flowlabel == NULL)
                                 return -EINVAL;
-                        usin->sin6_addr = flowlabel->dst;
                 }
         }
 
diff --git a/net/ipv6/fib6_rules.c b/net/ipv6/fib6_rules.c
index e27591635f92..3fd0a578329e 100644
--- a/net/ipv6/fib6_rules.c
+++ b/net/ipv6/fib6_rules.c
@@ -122,7 +122,11 @@ out:
 static bool fib6_rule_suppress(struct fib_rule *rule, struct fib_lookup_arg *arg)
 {
         struct rt6_info *rt = (struct rt6_info *) arg->result;
-        struct net_device *dev = rt->rt6i_idev->dev;
+        struct net_device *dev = NULL;
+
+        if (rt->rt6i_idev)
+                dev = rt->rt6i_idev->dev;
+
         /* do not accept result if the route does
          * not meet the required prefix length
          */
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index 4acdb63495db..e6f931997996 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -1193,11 +1193,35 @@ int ip6_append_data(struct sock *sk, int getfrag(void *from, char *to,
 
         fragheaderlen = sizeof(struct ipv6hdr) + rt->rt6i_nfheader_len +
                         (opt ? opt->opt_nflen : 0);
-        maxfraglen = ((mtu - fragheaderlen) & ~7) + fragheaderlen - sizeof(struct frag_hdr);
+        maxfraglen = ((mtu - fragheaderlen) & ~7) + fragheaderlen -
+                     sizeof(struct frag_hdr);
 
         if (mtu <= sizeof(struct ipv6hdr) + IPV6_MAXPLEN) {
-                if (cork->length + length > sizeof(struct ipv6hdr) + IPV6_MAXPLEN - fragheaderlen) {
-                        ipv6_local_error(sk, EMSGSIZE, fl6, mtu-exthdrlen);
+                unsigned int maxnonfragsize, headersize;
+
+                headersize = sizeof(struct ipv6hdr) +
+                             (opt ? opt->tot_len : 0) +
+                             (dst_allfrag(&rt->dst) ?
+                              sizeof(struct frag_hdr) : 0) +
+                             rt->rt6i_nfheader_len;
+
+                maxnonfragsize = (np->pmtudisc >= IPV6_PMTUDISC_DO) ?
+                                 mtu : sizeof(struct ipv6hdr) + IPV6_MAXPLEN;
+
+                /* dontfrag active */
+                if ((cork->length + length > mtu - headersize) && dontfrag &&
+                    (sk->sk_protocol == IPPROTO_UDP ||
+                     sk->sk_protocol == IPPROTO_RAW)) {
+                        ipv6_local_rxpmtu(sk, fl6, mtu - headersize +
+                                                   sizeof(struct ipv6hdr));
+                        goto emsgsize;
+                }
+
+                if (cork->length + length > maxnonfragsize - headersize) {
+emsgsize:
+                        ipv6_local_error(sk, EMSGSIZE, fl6,
+                                         mtu - headersize +
+                                         sizeof(struct ipv6hdr));
                         return -EMSGSIZE;
                 }
         }
@@ -1222,12 +1246,6 @@ int ip6_append_data(struct sock *sk, int getfrag(void *from, char *to,
          * --yoshfuji
          */
 
-        if ((length > mtu) && dontfrag && (sk->sk_protocol == IPPROTO_UDP ||
-                                           sk->sk_protocol == IPPROTO_RAW)) {
-                ipv6_local_rxpmtu(sk, fl6, mtu-exthdrlen);
-                return -EMSGSIZE;
-        }
-
         skb = skb_peek_tail(&sk->sk_write_queue);
         cork->length += length;
         if (((length > mtu) ||
diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c
index d6062325db08..7881965a8248 100644
--- a/net/ipv6/ip6_tunnel.c
+++ b/net/ipv6/ip6_tunnel.c
@@ -103,16 +103,25 @@ struct ip6_tnl_net {
 
 static struct net_device_stats *ip6_get_stats(struct net_device *dev)
 {
-        struct pcpu_tstats sum = { 0 };
+        struct pcpu_tstats tmp, sum = { 0 };
         int i;
 
         for_each_possible_cpu(i) {
+                unsigned int start;
                 const struct pcpu_tstats *tstats = per_cpu_ptr(dev->tstats, i);
 
-                sum.rx_packets += tstats->rx_packets;
-                sum.rx_bytes   += tstats->rx_bytes;
-                sum.tx_packets += tstats->tx_packets;
-                sum.tx_bytes   += tstats->tx_bytes;
+                do {
+                        start = u64_stats_fetch_begin_bh(&tstats->syncp);
+                        tmp.rx_packets = tstats->rx_packets;
+                        tmp.rx_bytes = tstats->rx_bytes;
+                        tmp.tx_packets = tstats->tx_packets;
+                        tmp.tx_bytes =  tstats->tx_bytes;
+                } while (u64_stats_fetch_retry_bh(&tstats->syncp, start));
+
+                sum.rx_packets += tmp.rx_packets;
+                sum.rx_bytes   += tmp.rx_bytes;
+                sum.tx_packets += tmp.tx_packets;
+                sum.tx_bytes   += tmp.tx_bytes;
         }
         dev->stats.rx_packets = sum.rx_packets;
         dev->stats.rx_bytes   = sum.rx_bytes;
@@ -824,8 +833,10 @@ static int ip6_tnl_rcv(struct sk_buff *skb, __u16 protocol,
                 }
 
                 tstats = this_cpu_ptr(t->dev->tstats);
+                u64_stats_update_begin(&tstats->syncp);
                 tstats->rx_packets++;
                 tstats->rx_bytes += skb->len;
+                u64_stats_update_end(&tstats->syncp);
 
                 netif_rx(skb);
 
diff --git a/net/ipv6/ip6_vti.c b/net/ipv6/ip6_vti.c
index ed94ba61dda0..7b42d5ef868d 100644
--- a/net/ipv6/ip6_vti.c
+++ b/net/ipv6/ip6_vti.c
@@ -75,26 +75,6 @@ struct vti6_net {
         struct ip6_tnl __rcu **tnls[2];
 };
 
-static struct net_device_stats *vti6_get_stats(struct net_device *dev)
-{
-        struct pcpu_tstats sum = { 0 };
-        int i;
-
-        for_each_possible_cpu(i) {
-                const struct pcpu_tstats *tstats = per_cpu_ptr(dev->tstats, i);
-
-                sum.rx_packets += tstats->rx_packets;
-                sum.rx_bytes   += tstats->rx_bytes;
-                sum.tx_packets += tstats->tx_packets;
-                sum.tx_bytes   += tstats->tx_bytes;
-        }
-        dev->stats.rx_packets = sum.rx_packets;
-        dev->stats.rx_bytes   = sum.rx_bytes;
-        dev->stats.tx_packets = sum.tx_packets;
-        dev->stats.tx_bytes   = sum.tx_bytes;
-        return &dev->stats;
-}
-
 #define for_each_vti6_tunnel_rcu(start) \
         for (t = rcu_dereference(start); t; t = rcu_dereference(t->next))
 
@@ -331,8 +311,10 @@ static int vti6_rcv(struct sk_buff *skb)
                 }
 
                 tstats = this_cpu_ptr(t->dev->tstats);
+                u64_stats_update_begin(&tstats->syncp);
                 tstats->rx_packets++;
                 tstats->rx_bytes += skb->len;
+                u64_stats_update_end(&tstats->syncp);
 
                 skb->mark = 0;
                 secpath_reset(skb);
@@ -716,7 +698,7 @@ static const struct net_device_ops vti6_netdev_ops = {
         .ndo_start_xmit = vti6_tnl_xmit,
         .ndo_do_ioctl   = vti6_ioctl,
         .ndo_change_mtu = vti6_change_mtu,
-        .ndo_get_stats  = vti6_get_stats,
+        .ndo_get_stats64 = ip_tunnel_get_stats64,
 };
 
 /**
@@ -750,12 +732,18 @@ static void vti6_dev_setup(struct net_device *dev)
 static inline int vti6_dev_init_gen(struct net_device *dev)
 {
         struct ip6_tnl *t = netdev_priv(dev);
+        int i;
 
         t->dev = dev;
         t->net = dev_net(dev);
         dev->tstats = alloc_percpu(struct pcpu_tstats);
         if (!dev->tstats)
                 return -ENOMEM;
+        for_each_possible_cpu(i) {
+                struct pcpu_tstats *stats;
+                stats = per_cpu_ptr(dev->tstats, i);
+                u64_stats_init(&stats->syncp);
+        }
         return 0;
 }
 
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index 3512177deb4d..300865171394 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -1277,6 +1277,9 @@ skip_linkparms:
                             ri->prefix_len == 0)
                                 continue;
 #endif
+                        if (ri->prefix_len == 0 &&
+                            !in6_dev->cnf.accept_ra_defrtr)
+                                continue;
                         if (ri->prefix_len > in6_dev->cnf.accept_ra_rt_info_max_plen)
                                 continue;
                         rt6_route_rcv(skb->dev, (u8*)p, (p->nd_opt_len) << 3,
diff --git a/net/ipv6/netfilter/ip6t_SYNPROXY.c b/net/ipv6/netfilter/ip6t_SYNPROXY.c
index f78f41aca8e9..a0d17270117c 100644
--- a/net/ipv6/netfilter/ip6t_SYNPROXY.c
+++ b/net/ipv6/netfilter/ip6t_SYNPROXY.c
@@ -446,6 +446,7 @@ static void synproxy_tg6_destroy(const struct xt_tgdtor_param *par)
 static struct xt_target synproxy_tg6_reg __read_mostly = {
         .name           = "SYNPROXY",
         .family         = NFPROTO_IPV6,
+        .hooks          = (1 << NF_INET_LOCAL_IN) | (1 << NF_INET_FORWARD),
         .target         = synproxy_tg6,
         .targetsize     = sizeof(struct xt_synproxy_info),
         .checkentry     = synproxy_tg6_check,
diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index 7fb4e14c467f..b6bb87e55805 100644
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -792,7 +792,6 @@ static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
                                 flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
                                 if (flowlabel == NULL)
                                         return -EINVAL;
-                                daddr = &flowlabel->dst;
                         }
                 }
 
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 7faa9d5e1503..4b4944c3e4c4 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -84,6 +84,8 @@ static int		 ip6_dst_gc(struct dst_ops *ops);
 
 static int              ip6_pkt_discard(struct sk_buff *skb);
 static int              ip6_pkt_discard_out(struct sk_buff *skb);
+static int              ip6_pkt_prohibit(struct sk_buff *skb);
+static int              ip6_pkt_prohibit_out(struct sk_buff *skb);
 static void             ip6_link_failure(struct sk_buff *skb);
 static void             ip6_rt_update_pmtu(struct dst_entry *dst, struct sock *sk,
                                            struct sk_buff *skb, u32 mtu);
@@ -234,9 +236,6 @@ static const struct rt6_info ip6_null_entry_template = {
 
 #ifdef CONFIG_IPV6_MULTIPLE_TABLES
 
-static int ip6_pkt_prohibit(struct sk_buff *skb);
-static int ip6_pkt_prohibit_out(struct sk_buff *skb);
-
 static const struct rt6_info ip6_prohibit_entry_template = {
         .dst = {
                 .__refcnt       = ATOMIC_INIT(1),
@@ -1565,21 +1564,24 @@ int ip6_route_add(struct fib6_config *cfg)
                                 goto out;
                         }
                 }
-                rt->dst.output = ip6_pkt_discard_out;
-                rt->dst.input = ip6_pkt_discard;
                 rt->rt6i_flags = RTF_REJECT|RTF_NONEXTHOP;
                 switch (cfg->fc_type) {
                 case RTN_BLACKHOLE:
                         rt->dst.error = -EINVAL;
+                        rt->dst.output = dst_discard;
+                        rt->dst.input = dst_discard;
                         break;
                 case RTN_PROHIBIT:
                         rt->dst.error = -EACCES;
+                        rt->dst.output = ip6_pkt_prohibit_out;
+                        rt->dst.input = ip6_pkt_prohibit;
                         break;
                 case RTN_THROW:
-                        rt->dst.error = -EAGAIN;
-                        break;
                 default:
-                        rt->dst.error = -ENETUNREACH;
+                        rt->dst.error = (cfg->fc_type == RTN_THROW) ? -EAGAIN
+                                        : -ENETUNREACH;
+                        rt->dst.output = ip6_pkt_discard_out;
+                        rt->dst.input = ip6_pkt_discard;
                         break;
                 }
                 goto install_route;
@@ -1903,9 +1905,7 @@ static struct rt6_info *ip6_rt_copy(struct rt6_info *ort,
                 else
                         rt->rt6i_gateway = *dest;
                 rt->rt6i_flags = ort->rt6i_flags;
-                if ((ort->rt6i_flags & (RTF_DEFAULT | RTF_ADDRCONF)) ==
-                    (RTF_DEFAULT | RTF_ADDRCONF))
-                        rt6_set_from(rt, ort);
+                rt6_set_from(rt, ort);
                 rt->rt6i_metric = 0;
 
 #ifdef CONFIG_IPV6_SUBTREES
@@ -2144,8 +2144,6 @@ static int ip6_pkt_discard_out(struct sk_buff *skb)
         return ip6_pkt_drop(skb, ICMPV6_NOROUTE, IPSTATS_MIB_OUTNOROUTES);
 }
 
-#ifdef CONFIG_IPV6_MULTIPLE_TABLES
-
 static int ip6_pkt_prohibit(struct sk_buff *skb)
 {
         return ip6_pkt_drop(skb, ICMPV6_ADM_PROHIBITED, IPSTATS_MIB_INNOROUTES);
@@ -2157,8 +2155,6 @@ static int ip6_pkt_prohibit_out(struct sk_buff *skb)
         return ip6_pkt_drop(skb, ICMPV6_ADM_PROHIBITED, IPSTATS_MIB_OUTNOROUTES);
 }
 
-#endif
-
 /*
  *      Allocate a dst for local (unicast / anycast) address.
  */
@@ -2168,12 +2164,10 @@ struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
                                     bool anycast)
 {
         struct net *net = dev_net(idev->dev);
-        struct rt6_info *rt = ip6_dst_alloc(net, net->loopback_dev, 0, NULL);
-
-        if (!rt) {
-                net_warn_ratelimited("Maximum number of routes reached, consider increasing route/max_size\n");
+        struct rt6_info *rt = ip6_dst_alloc(net, net->loopback_dev,
+                                            DST_NOCOUNT, NULL);
+        if (!rt)
                 return ERR_PTR(-ENOMEM);
-        }
 
         in6_dev_hold(idev);
 
diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
index 366fbba3359a..d3005b34476a 100644
--- a/net/ipv6/sit.c
+++ b/net/ipv6/sit.c
@@ -702,8 +702,10 @@ static int ipip6_rcv(struct sk_buff *skb)
                 }
 
                 tstats = this_cpu_ptr(tunnel->dev->tstats);
+                u64_stats_update_begin(&tstats->syncp);
                 tstats->rx_packets++;
                 tstats->rx_bytes += skb->len;
+                u64_stats_update_end(&tstats->syncp);
 
                 netif_rx(skb);
 
@@ -924,7 +926,7 @@ static netdev_tx_t ipip6_tunnel_xmit(struct sk_buff *skb,
                 if (tunnel->parms.iph.daddr && skb_dst(skb))
                         skb_dst(skb)->ops->update_pmtu(skb_dst(skb), NULL, skb, mtu);
 
-                if (skb->len > mtu) {
+                if (skb->len > mtu && !skb_is_gso(skb)) {
                         icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);
                         ip_rt_put(rt);
                         goto tx_error;
@@ -966,8 +968,10 @@ static netdev_tx_t ipip6_tunnel_xmit(struct sk_buff *skb,
         tos = INET_ECN_encapsulate(tos, ipv6_get_dsfield(iph6));
 
         skb = iptunnel_handle_offloads(skb, false, SKB_GSO_SIT);
-        if (IS_ERR(skb))
+        if (IS_ERR(skb)) {
+                ip_rt_put(rt);
                 goto out;
+        }
 
         err = iptunnel_xmit(rt, skb, fl4.saddr, fl4.daddr, IPPROTO_IPV6, tos,
                             ttl, df, !net_eq(tunnel->net, dev_net(dev)));
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 0740f93a114a..f67033b4bb66 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -156,7 +156,6 @@ static int tcp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
                         flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
                         if (flowlabel == NULL)
                                 return -EINVAL;
-                        usin->sin6_addr = flowlabel->dst;
                         fl6_sock_release(flowlabel);
                 }
         }
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index bcd5699313c3..089c741a3992 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -1140,7 +1140,6 @@ do_udp_sendmsg:
                                 flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
                                 if (flowlabel == NULL)
                                         return -EINVAL;
-                                daddr = &flowlabel->dst;
                         }
                 }